Netskope Global Technical Success (GTS)

Use Case - Blocking Emails Destined to Personal Email Accounts

Netskope Cloud Version - 118

Objective

Blocking Destined Emails to Personal Email Accounts

Prerequisite

Netskope CASB Inline license is required

Context

To implement measures for blocking emails directed to personal email accounts.

Do You Know?

• As of April 29, 2024, Netskope recognizes 268 cloud applications categorized under ‘Webmail’

• Netskope engines are capable of detecting the sender and recipient when an end-user sends an email

Sender - From User

Recipient - To User

Configuration

Prior to proceeding with the configuration, could you kindly provide answers to the following queries:

1. What is your official webmail platform?
2. Do you permit users to access non-official webmail platforms?

In the below configuration, I am assuming that the answer to the above questions is 

1. What is your official webmail platform?

Google Gmail

2. Do you permit users to access non-official webmail platforms?

Yes but the access is restricted

In the below example, I am considering Google Gmail is my official webmail platforms

• Step 1 - Instance Tagging

Path - Netskope Tenant UI >>> Skope IT >>> Application Events

• Step 2 - Constraint profile

Path - Netskope Tenant UI >>> Policies >>> Profiles - - - Constraints

• Step 3 - Real-time protection policy

Path - Netskope Tenant UI >>> Policies >>> Real-time Protection >>> New Policy

1st Policy

2nd Policy

3rd Policy

Policy Order

Verification

• Step 1 - Sending an email to my personal gmail id

• Step 2 - Check policy hits

Attached Caveats

• The administrator needs to manually update the constraint list.

Terms and Conditions

• All documented information undergoes testing and verification to ensure accuracy.
• In the future, it is possible that the application's functionality may be altered by the vendor. If any such changes are brought to our attention, we will promptly update the documentation to reflect them.

Notes

• This article is authored by Netskope Global Technical Success (GTS).
• For any further inquiries related to this article, please contact Netskope GTS by submitting a support case with 'Case Type – How To Questions'.